KROHNE BM 26 BASIC Wiring diagram

Magnetic Bypass Level Indicators (MLI) for general-
purpose applications
Supplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applicationsSupplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applications
BM 26 BASIC/ADVANCED
BM 26 BASIC/ADVANCEDBM 26 BASIC/ADVANCED
BM 26 BASIC/ADVANCED Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 06/2016 - 4000347104 - AD ATEX BM 26 Bas-Adv R04 en

CONTENTS
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BM 26 BASIC/ADVANCED
1 Introduction 4
2 Measuring chamber 5
2.1 General safety information............................................................................................... 5
2.1.1 Scope....................................................................................................................................... 5
2.1.2 Device description................................................................................................................... 5
2.1.3 Standards and approvals ........................................................................................................ 5
2.1.4 Categories: c-approved devices ............................................................................................. 6
2.1.5 ATEX nameplates: measuring chamber................................................................................. 7
2.2 Installation........................................................................................................................ 7
2.2.1 Precautions ............................................................................................................................. 7
2.2.2 Operating conditions............................................................................................................... 8
2.3 Electrical connections.................................................................................................... 10
2.3.1 Potential earth (PE): measuring chamber ........................................................................... 10
2.4 Start-up........................................................................................................................... 10
3 Limit switch 11
3.1 General safety information............................................................................................. 11
3.1.1 Scope..................................................................................................................................... 11
3.1.2 Device description................................................................................................................. 11
3.1.3 Standards and approvals ...................................................................................................... 11
3.1.4 Categories: Ex ia-approved devices ..................................................................................... 12
3.1.5 ATEX nameplates: level switch............................................................................................. 13
3.2 Installation...................................................................................................................... 14
3.2.1 Precautions ........................................................................................................................... 14
3.2.2 Operating conditions............................................................................................................. 15
3.3 Electrical connections.................................................................................................... 15
3.3.1 Ex i limit switches ................................................................................................................. 15
3.4 Start-up........................................................................................................................... 16
4 Analog transmitter 17
4.1 General safety information............................................................................................. 17
4.1.1 Scope..................................................................................................................................... 17
4.1.2 Device description................................................................................................................. 17
4.1.3 Standards and approvals ...................................................................................................... 18
4.1.4 Categories: Ex ia-approved devices ..................................................................................... 18
4.1.5 ATEX nameplates: analog transmitter ................................................................................. 19
4.2 Installation...................................................................................................................... 20
4.2.1 Precautions ........................................................................................................................... 20
4.2.2 Operating conditions............................................................................................................. 21
4.3 Electrical connections.................................................................................................... 22
4.3.1 General notes........................................................................................................................ 22
4.3.2 Ex i analog transmitter ......................................................................................................... 22
4.4 Start-up........................................................................................................................... 23
4.5 Periodic maintenance..................................................................................................... 24
4.6 How to clean the device.................................................................................................. 24

CONTENTS
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BM 26 BASIC/ADVANCED
5 Assembled equipment 25
5.1 General safety information............................................................................................. 25
5.1.1 Scope..................................................................................................................................... 25
5.1.2 Standards and approvals ...................................................................................................... 26
5.1.3 Categories ............................................................................................................................. 26
5.2 Installation...................................................................................................................... 27
5.2.1 Precautions ........................................................................................................................... 27
5.2.2 Operating conditions............................................................................................................. 28
5.3 Electrical connections.................................................................................................... 33
5.4 Start-up........................................................................................................................... 33
6 Service 34
6.1 Periodic maintenance..................................................................................................... 34
6.2 Keep the device clean..................................................................................................... 34
6.3 Returning the device to the manufacturer..................................................................... 34
6.3.1 General information.............................................................................................................. 34
6.3.2 Form (for copying) to accompany a returned device............................................................ 35

1 INTRODUCTION
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These supplementary instructions give explosion protection data about the basic configuration of
the device, its optional add-ons and the assembled device (with add-ons).
Basic configuration
•measuring chamber
Optional add-ons
•LT40 analog transmitter
•MS40 limit switch
INFORMATION!
If you use the LT40 analog transmitter without the BM 26 Basic or BM 26 Advanced measuring
chamber, refer to Analog transmitter on page 17
If you use the MS40 limit switch without the BM 26 Basic or BM 26 Advanced measuring
chamber, refer to
Limit switch on page 11

MEASURING CHAMBER 2
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2.1 General safety information
2.1.1 Scope
These instructions are applicable only to the explosion-protection version of the measuring
chamber. For all other data, use the Quick Start and Handbook for the magnetic level indicator. If
you do not have these documents, please contact the nearest sales office or download them
from the website www.krohne.com.
2.1.2 Device description
The measuring chamber of the bypass level indicator uses a magnetic float for indication. A
heat-resistant column of rotating flaps indicates level and volume of liquids.
The Basic
BasicBasic
Basic version is designed to indicate the level and volume of liquids for simple, low-pressure
applications. It is attached vertically to the side of open or pressurized tanks.
The Advanced
AdvancedAdvanced
Advanced version is designed to indicate the level and volume of liquids in hydrocarbon
applications. It is attached vertically to the side of pressurized tanks.
These devices are approved for use in potentially explosive atmospheres when equipped with the
appropriate options.
2.1.3 Standards and approvals
WARNING!
Installation, commissioning and maintenance may only be carried out by "Personnel trained in
explosion protection".
WARNING!
The information in this chapter only contains Ex data applicable to the measuring chamber of the
magnetic level indicator. For more data on use with other equipment, refer to Assembled
equipment on page 25
. If there is a TDR or radar level transmitter attached to the top of the
measuring chamber, also refer to the ATEX supplementary instructions for these devices.
INFORMATION!
The information in this ATEX supplement only contains the data applicable to explosion
protection. The technical data in the installation and operating manual for the non-Ex version
shall be valid in its current version, provided that they are not rendered invalid or are replaced by
this ATEX supplement.
DANGER!
In compliance with European Directive 2014/34/EU (ATEX 100a), the ATEX versions of the
measuring chamber for the Basic and Advanced Bypass Level Indicators described in these
Supplementary Instructions conform to European Standards EN 13463-1:2009 and
EN 13463-5:2011. The c-approved versions (c = constructional safety) are certified for use in
hazardous areas by INERIS under INERIS 08ATEX0044 X.
WARNING!
Carefully read the ATEX approval certificate for the bypass level indicator (measuring chamber).
Obey the boundary conditions.

2 MEASURING CHAMBER
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2.1.4 Categories: c-approved devices
The c-approved device has the markings that follow:
BM 26 Basic
Without adhesive label and without PLEXIGLAS®anti-freeze protection:
II 1 G c IIC T6...T3
With adhesive label, but without PLEXIGLAS®anti-freeze protection:
II 1/2 G c IIC T6...T3
With adhesive label and with PLEXIGLAS®anti-freeze protection:
II 1/2 G c IIB T6...T3
BM 26 Advanced
Without adhesive label and without PLEXIGLAS®anti-freeze protection:
II 1 G c IIC T6...T1
With adhesive label, but without PLEXIGLAS®anti-freeze protection:
II 1/2 G c IIC T6...T1
With adhesive label and with PLEXIGLAS®anti-freeze protection:
II 1/2 G c IIB T6...T1
The measuring chamber is designed for ATEX applications when the appropriate options are
selected (type code *F40**1**). The measuring chamber is applicable for use in potentially
explosive atmospheres of all flammable substances in Gas Group IIA, IIB and IIC. If it is used with
an adhesive label and anti-freeze protection, it is only applicable for use in potentially explosive
atmospheres of all flammable substances in Gas Group IIA and IIB. It is certified for applications
requiring Category 1 G (gases, vapours or mists) or Category 1/2 G equipment.
Category 1 G equipment are used in zone 0. Category 1/2 G equipment are used in zone 0, but
they are installed in the boundary wall between zone 0 and zone 1 (the inner surface of the
measuring chamber is in zone 0 and the outer surface of the measuring chamber is in zone 1).
INFORMATION!
The measuring chamber can also be installed in hazardous areas requiring Category 2 or
Category 3 equipment.

MEASURING CHAMBER 2
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2.1.5 ATEX nameplates: measuring chamber
2.2 Installation
2.2.1 Precautions
General notes
Electrostatic discharge
Take the necessary antistatic precautions if you:
•handle,
•install or
•use
the device in potentially explosive atmospheres. Do not install in a location (near to ventilation
systems, for example) where the electrostatic charge can increase.
Figure 2-1: ATEX nameplate for the Basic and Advanced version of the bypass level indicator (measuring chamber)
1 ATEX certification code. Refer also to temperature classes
temperature classestemperature classes
temperature classes.
2 Equipment approval
3 ATEX notified body
WARNING!
When you install the device, obey the conditions in the EC-Type Examination certificate. These
conditions include:
• The special conditions for safe use.
• The Essential Health and Safety Requirements.
DANGER!
Risk of electrostatic discharge from the anti-freeze cover option. Make sure that all personnel
and equipment are correctly grounded.

2 MEASURING CHAMBER
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Special conditions
2.2.2 Operating conditions
The ATEX equipment category and temperature class give the ambient temperature range for
the measuring chamber. This data is marked on the nameplate of the measuring chamber.
Basic version (without electrical equipment)
The ATEX equipment category and temperature class give the ambient temperature and related
process temperature ranges for the device.
-40°C/-40°F is the minimum temperature for the Basic version of the magnetic level indicator.
Equipment categories II 1 G and 1/2 G
Equipment category II 2 G and 3 G
WARNING!
The anti-freeze cover option is possible source of ignition in a potentially explosive atmosphere.
It covers the glass tube of the indicator column. Clean the anti-freeze cover option only with a
damp cloth.
WARNING!
Steel objects will not hit a float made of titanium in the stainless steel measuring chamber. If you
must install the float in the measuring chamber or service the device, make sure that you do not
hit titanium floats with a steel or rusty steel tool (hammer etc.) or other object.
WARNING!
Devices equipped with metallic floats
Devices equipped with metallic floatsDevices equipped with metallic floats
Devices equipped with metallic floats: The device has a non-sparking disc attached to the inner
side of the bottom counter flange. You must replace this part at intervals of 10 years. For the
procedure to replace this part, speak or write to your supplier.
WARNING!
Maximum rate of change in level must not be more than 1 m/s / 3.3 ft/s.
Temperature class Maximum ambient
temperature
Maximum process
temperature
[°C] [°F] [°C] [°F]
T6 +68 +154 +68 +154
T5 +80 +176 +80 +176
T4 +80 +176 +108 +226
T3 +80 +176 +150 +302
Temperature class Maximum ambient
temperature
Maximum process
temperature
[°C] [°F] [°C] [°F]
T6 +80 +176 +80 +176
T5 +80 +176 +95 +203
T4 +80 +176 +130 +266
T3 +80 +176 +150 +302

MEASURING CHAMBER 2
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Advanced version (without electrical equipment)
The ATEX equipment category and temperature class give the ambient temperature and related
process temperature ranges for the device.
-70°C/-94°F is the minimum temperature for the Advanced version of the magnetic level
indicator.
Equipment categories II 1 G and 1/2 G
Equipment category II 2 G and 3 G
WARNING!
Maximum rate of change in level must not be more than 1 m/s / 3.3 ft/s.
Temperature class Maximum ambient
temperature
Maximum process
temperature
[°C] [°F] [°C] [°F]
T6 +68 +154 +68 +154
T5 +80 +176 +80 +176
T4 +80 +176 +108 +226
T3 +80 +176 +160 +320
T2 +80 +176 +240 +464
T1 +80 +176 +360 +680
Temperature class Maximum ambient
temperature
Maximum process
temperature
[°C] [°F] [°C] [°F]
T6 +80 +176 +80 +176
T5 +80 +176 +95 +203
T4 +80 +176 +130 +266
T3 +80 +176 +195 +383
T2 +80 +176 +290 +554
T1 +80 +176 +440 +824

2 MEASURING CHAMBER
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2.3 Electrical connections
2.3.1 Potential earth (PE): measuring chamber
Connect an electrical cable with a metallic shield to the PE. The PE is installed at the bottom of
the measuring chamber, on the side of the device nameplate.
2.4 Start-up
Do a start-up check:
• Are the wetted components (gasket, chamber and float) resistant to corrosion by the tank
product?
• Does the information given on the nameplate agree with the application?
• Did you connect the equipotential bonding system correctly?
Figure 2-2: Potential Earth (PE)
1 PE terminal

LIMIT SWITCH 3
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3.1 General safety information
3.1.1 Scope
These instructions are applicable only to the explosion-protection version of the bistable limit
switch. For all other data, use the Quick Start and Handbook for the magnetic level indicator. If
you do not have these documents, please contact the nearest sales office or download them
from the website www.krohne.com.
3.1.2 Device description
The limit switch uses a bistable reed switch to detect the level of the liquid. It is attached
adjacent to the measuring chamber of the magnetic level indicator.
This accessory is approved for use in potentially explosive atmospheres when equipped with the
appropriate options.
3.1.3 Standards and approvals
The certificate is given on the DVD-ROM supplied with the device. You can also download the
certificate from our internet site.
WARNING!
Installation, commissioning and maintenance may only be carried out by "Personnel trained in
explosion protection".
WARNING!
The information in this chapter only contains Ex data applicable to the limit switch. For more
data on use of this option with the measuring chamber, refer to Assembled equipment on page
25
.
INFORMATION!
The information in this ATEX supplement only contains the data applicable to explosion
protection. The technical data in the handbook for the non-Ex version shall be valid in its current
version, provided that they are not rendered invalid or are replaced by this ATEX supplement.
DANGER!
In compliance with European Directives 94/9/EC (applicable until 19 April 2016) and 2014/34/EU
(applicable from 20 April 2016), the ATEX versions of the limit switch described in these
Supplementary Instructions conform to European Standards EN 60079-0 :2012 + A11 :2013,
EN 60079-11 :2012 and EN 60079 26 :2015. The Ex ia version is certified for use in hazardous
areas by INERIS under INERIS 08ATEX0045 X.
WARNING!
Carefully read the ATEX approval certificate for the limit switch. Obey the boundary conditions.

3 LIMIT SWITCH
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3.1.4 Categories: Ex ia-approved devices
The Ex ia-approved device has the markings that follow:
II 1 GD
Ex ia IIC T4…T6* Ga
Ex ia IIIC T135°C…T85°C* Da
* The ambient temperature for the device must agree with the temperature class data on page
15.
The limit switch is designed for ATEX applications when the appropriate options are selected
(type code *F40**1**). The limit switch is suitable for use in potentially explosive atmospheres of
all flammable substances in Gas Group IIA, IIB and IIC. It is certified for applications requiring
Category 1 G (gases, vapours or mists) and EPL Ga or Category 2 G and EPL Gb equipment. It
also agrees with temperature class T3, T2 and T1 (Gas Groups) if the temperature limits are
obeyed. For more data, refer to
Operating conditions on page 15.
Category 1 G equipment are used in zone 0. Category 2 G equipment are used in zone 1.
The Ex ia-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Dust Groups IIIA, IIIB and IIIC. It is certified for applications requiring
Category 1 D (dust) and EPL Da or Category 2 D and EPL Db equipment, when fitted with the
appropriate options. The surface temperature of the housing (without a layer of dust) cannot be
more than +85°C / +185°F if no other heat is supplied from the measured process.
Category 1 D equipment are used in zone 20. Category 2 D equipment are used in zone 21.
The limit switch agrees with protection category IP6X for dust. The housing has an M16×1.5
plastic cable gland.

LIMIT SWITCH 3
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3.1.5 ATEX nameplates: level switch
Figure 3-1: Ex i nameplate for the level switch (non-Namur)
Figure 3-2: Ex i nameplate for the level switch (Namur)
1 ATEX certification agency code. Refer also to temperature classes
temperature classestemperature classes
temperature classes.
2 Equipment approval
3 Intrinsically-safe circuit data

3 LIMIT SWITCH
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3.2 Installation
3.2.1 Precautions
General notes
The certificate is given on the DVD-ROM supplied with the device. You can also download the
certificate from our internet site.
Special conditions
Make sure that:
•you can get access to the device,
•there is sufficient space around the device for inspections
•you can see the device nameplate, and
•there are no external forces applied on the device.
WARNING!
When you install the device, obey the conditions in the EC-Type Examination certificate. These
conditions include:
• The special conditions for safe use.
• The Essential Health and Safety Requirements.
DANGER!
This installation must agree with EN 60079-14: Electrical installations in hazardous areas.
WARNING!
Equipment category 1 G only
Equipment category 1 G onlyEquipment category 1 G only
Equipment category 1 G only
The housing of the device is a possible source of ignition in a potentially explosive atmosphere. It
is made of aluminium.
Install the device in an applicable location to make sure that iron/steel objects do not hit or rub
against aluminium parts.
Do not put the equipment fully into dust.

LIMIT SWITCH 3
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3.2.2 Operating conditions
The ATEX equipment category and temperature class give the ambient temperature range for
the limit switch. This data is marked on the nameplate of the limit switch.
Equipment category II 1 G or 1 D (Ex i applications and non-Namur devices only)
Equipment category II 1 G or 1 D (Ex i applications and Namur devices only)
3.3 Electrical connections
3.3.1 Ex i limit switches
• Electrical wires must agree with applicable standards (e.g. EN 60079-14).
• Use the electrical connection procedure in the Handbook.
• Put the electrical wires down, set them in position, and safely attach them to prevent damage.
The electrical wires must also be a sufficient distance from hot surfaces.
• Make sure that unused electrical wires are safely connected to the earth of the hazardous
area. If this is not possible, make sure that each of the unused electrical wires are safely
isolated (other electrical wires, ground etc.).
• If it is necessary, make sure that the electrical wire insulation gives good protection from
corrosion.
• If possible, use galvanically-isolated equipment.
• Supply the Ex i equipment connected to the limit switch. Use only certified intrinsically-safe
equipment.
• Connect only to separate certified, intrinsically-safe circuits. Make sure that the electrical
circuit characteristics are not more than the values that follow:
• Do not remove more than 6 mm / 0.2¨of insulation from the wire.
Temperature class Ambient temperature
Gas Dust [°C] [°F]
T6 T85°C-40…+80 -40…+176
T5 T100°C-40…+95 -40…+203
T4 T135°C-40…+130 -40…+266
Temperature class Ambient temperature
Gas Dust [°C] [°F]
T6 T85°C-40…+70 -40…+158
T5 T100°C-40…+85 -40…+185
T4 T135°C-40…+120 -40…+248
DANGER!
Non-NAMUR limit switches:
Non-NAMUR limit switches:Non-NAMUR limit switches:
Non-NAMUR limit switches: The power supply must be intrinsically safe.

3 LIMIT SWITCH
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Non-NAMUR limit switches: Maximum intrinsically-safe values for the electrical
circuit
•U
i
≤250 VAC/DC
•I
i
≤1A
•P
i
≤60 VA/W
•C
i
≈0nF
•L
i
=0 μH
NAMUR limit switches: Maximum intrinsically-safe values for the electrical circuit
•U
i
≤24 V
•I
i
≤0.1 A
•P
i
≤0.21 W
•C
i
≈0nF
•L
i
=0 μH
3.4 Start-up
• Does the information given on the nameplate agree with the application?
• Ex i applications:
Ex i applications:Ex i applications:
Ex i applications: Are you using an intrinsically-safe barrier within the correct parameters?
For more data, refer to
Ex i limit switches on page 15. The electrical circuit characteristics
must not be more than the maximum intrinsically-safe values.
• Is the terminal compartment correctly sealed?
INFORMATION!
The electrical parts are isolated from the metallic parts of the device with a rating of 500 V
rms
.
WARNING!
Make sure that it is safe to supply electrical power. Do a start-up check:

ANALOG TRANSMITTER 4
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4.1 General safety information
4.1.1 Scope
These instructions are applicable only to the explosion-protection version of the analog
transmitter. For all other data, use the Quick Start and Handbook for the magnetic level
indicator. If you do not have these documents, please contact the nearest sales office or
download them from the website www.krohne.com.
4.1.2 Device description
The analog transmitter converts a variable resistance from a reed chain to an analog or digital
output. This resistance corresponds to the level of the float in the measuring chamber. The
analog transmitter is attached adjacent to the measuring chamber of the magnetic level
indicator.
The table that follows gives alternative transmitter modules for conversion of the variable
resistance to an analog or digital output:
Converter outputs
This accessory is approved for use in potentially explosive atmospheres when equipped with the
appropriate options.
WARNING!
Installation, commissioning and maintenance may only be carried out by "Personnel trained in
explosion protection".
WARNING!
The information in this chapter only contains data applicable to the analog transmitter. For more
data on use with the measuring chamber, refer to Assembled equipment on page 25
.
INFORMATION!
The information in this ATEX supplement only contains the data applicable to explosion
protection. The technical data in the handbook for the non-Ex version shall be valid in its current
version, provided that they are not rendered invalid or are replaced by this ATEX supplement.
Output module option Designation code (VF or SF)
Analog output modules
4…20 mA xF45xB1xxxx
4…20 mA and indicator option xF45xE1xxxx
Analog output + HART®communication modules
4…20 mA+HART®xF45xW1xxxx
4…20 mA+HART®and indicator option xF45xG1xxxx
Fieldbus output modules
FOUNDATION™fieldbus xF45xD1xxxx
PROFIBUS PA®(PR) xF45xX1xxxx
PROFIBUS PA®xF45xA1xxxx

4 ANALOG TRANSMITTER
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4.1.3 Standards and approvals
4.1.4 Categories: Ex ia-approved devices
The Ex ia-approved device has the markings that follow:
LT40 .F45.D1 or LT40 .F45.X1 versions
II 1 GD
Ex ia IIC T4…T6* Ga
Ex ia IIIC T135°C...T85°C* Da
II 2 GD
Ex ib IIC T4…T6* Gb
Ex ib IIIC T135°C...T85°C* Db
All other versions
II 1 GD
Ex ia IIC T4….T6* Ga (T5 if with display)
Ex ia IIIC T135°C...T85°C* Da (T135°C…T100°C if with display)
* The ambient temperature for the device must agree with the temperature class data on page
21.
The analog transmitter is designed for ATEX applications when the appropriate option is selected
(type code *F45**1****).
The analog transmitter is suitable for use in potentially explosive atmospheres of all flammable
substances in Gas Group IIA, IIB and IIC. It is certified for applications requiring Category 1 G
(gases, vapours or mists) and EPL Ga or Category 2 G and EPL Gb equipment. It also agrees with
temperature class T3, T2 and T1 (Gas Groups) if the temperature limits are obeyed. For more
data, refer to
Operating conditions on page 21.
Category 1 G equipment are used in zone 0. Category 2 G equipment are used in zone 1.
The Ex ia-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Dust Groups IIIA, IIIB and IIIC. It is certified for applications requiring
Category 1 D (dust) and EPL Da or Category 2 D and EPL Db equipment, when fitted with the
appropriate options. The surface temperature of the housing (without a layer of dust) cannot be
more than +85°C / +185°F if no other heat is supplied from the measured process.
DANGER!
In compliance with European Directives 94/9/EC (applicable until 19 April 2016) and 2014/34/EU
(applicable from 20 April 2016), the ATEX versions of the analog transmitter described in these
Supplementary Instructions conform to European Standards EN 60079-0:2012 + A11 :2013,
EN 60079-11 :2012, EN 60079-26 :2015. The Ex ia and Ex ib versions are certified for use in
hazardous areas by INERIS under INERIS 09ATEX0003 X.
WARNING!
Carefully read the ATEX approval certificate for the analog transmitter. Obey the boundary
conditions.
The certificate is given on the DVD-ROM supplied with the device. You can also download the
certificate from our internet site.

ANALOG TRANSMITTER 4
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Category 1 D equipment are used in zone 20. Category 2 D equipment are used in zone 21.
4.1.5 ATEX nameplates: analog transmitter
Figure 4-1: Ex i nameplates for the analog transmitter with a 4...20 mA transmitter module or a 4...20 mA+HART®
transmitter module
1 Type code (defined in the "order code" section of the technical data sheet)
2 ATEX certification agency code
3 Equipment approval. For more data, refer to
Operating conditions on page 21.
4 Intrinsically-safe circuit data. For more data, refer to
Ex i analog transmitter on page 22.
5 Text: WARNING –POTENTIAL ELECTROSTATIC HAZARD –SEE INSTRUCTIONS
Figure 4-2: Ex i nameplates for the analog transmitter with a fieldbus module
1 Type code (defined in the "order code" section of the technical data sheet)
2 ATEX certification agency code. Refer also to temperature classes
temperature classestemperature classes
temperature classes.
3 Equipment approval. For more data, refer to
Operating conditions on page 21.
4 Text for intrinsically-safe circuit data: FISCO Field Device –SEE INSTRUCTIONS FOR Ui, Ii, Pi
5 Intrinsically-safe circuit data. For more data, refer to
Ex i analog transmitter on page 22.
6 Text: WARNING –POTENTIAL ELECTROSTATIC HAZARD –SEE INSTRUCTIONS

4 ANALOG TRANSMITTER
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4.2 Installation
4.2.1 Precautions
General notes
The certificate is given on the DVD-ROM supplied with the device. You can also download the
certificate from our internet site.
Special conditions
Make sure that:
•you can get access to the device,
•there is sufficient space around the device for inspections
•you can see the device nameplate, and
•there are no external forces applied on the device.
The analog transmitter agrees with protection category IP68 (in 1 m of water for 30 minutes)
when it has an IP67 or IP68 cable gland and an electrical wire with the correct diameter.
Cable glands are supplied on customer demand. If you supply the cable glands, refer to the table
that follows for the selection of the cable gland:
WARNING!
When you install the device, obey the conditions in the EC-Type Examination certificate. These
conditions include:
• The special conditions for safe use.
• The Essential Health and Safety Requirements.
DANGER!
This installation must agree with EN 60079-14 Electrical installations in hazardous areas.
WARNING!
Equipment category 1 G only
Equipment category 1 G onlyEquipment category 1 G only
Equipment category 1 G only
The housing of the device is a possible source of ignition in a potentially explosive atmosphere. It
is made of aluminium.
Install the device in an applicable location to make sure that iron/steel objects do not hit or rub
against aluminium parts.
Hazardous conditions IP rating of the cable gland
Liquids (with or without gas or dust) IP67 / IP68
Dust without liquids IP6X
Gas without liquids ≥IP66 1
1The recommended IP rating is ≥IP66. The minimum IP rating is IP20.
WARNING!
Make sure that the tightening capacity of the cable gland is applicable to the diameter of the
electrical wire. Seal the cable entry.